Compilare: user.cpp: In function ‘long long int combinari(long long int, long long int)’: user.cpp:31:30: warning: unused variable ‘fact3’ [-Wunused-variable] int fact1 = 1,fact2 = 1, fact3 = 1; ^ user.cpp: In function ‘int main()’: user.cpp:41:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("nmult.in","r",stdin); ^ user.cpp:42:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("nmult.out","w",stdout); ^